CN110016637A - A kind of carbonitriding technology of automobile engine pump shaft - Google Patents
A kind of carbonitriding technology of automobile engine pump shaft Download PDFInfo
- Publication number
- CN110016637A CN110016637A CN201910443932.6A CN201910443932A CN110016637A CN 110016637 A CN110016637 A CN 110016637A CN 201910443932 A CN201910443932 A CN 201910443932A CN 110016637 A CN110016637 A CN 110016637A
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- CN
- China
- Prior art keywords
- pump shaft
- automobile engine
- engine pump
- furnace
- gas carburizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/04—Treatment of selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of carbonitriding technologies of automobile engine pump shaft, include the following steps: that the non-carbo-nitriding part (A) locally applies permeability-reducing admixture, it is to carry out natural air drying after the region of L1 uniformly paints water-soluble permeability-reducing admixture that the top of automobile engine pump shaft, which is taken length, a length of 30-40min when air-drying;(B) pit gas carburizing furnace is preheated, pit gas carburizing furnace is heated to W1 and keeps 10-20min;(C) workpiece is heated, after pit gas carburizing furnace preheats, kerosene 15-25ml is instilled to furnace bottom, after waiting the T1 time, the automobile engine pump shaft after air-drying is put into pit gas carburizing furnace, closes bell, then heated, duration continues T2.Local carbonitriding of the present invention and cold treatment, time-consuming short, points hardness needed for workpiece improves, and depth of penetration is deep, superior product quality.
Description
Technical field
The present invention relates to the carbonitriding technology technical field of automobile engine pump shaft, specially a kind of car engine pump
The carbonitriding technology of axis.
Background technique
Penetrate into the chemical surface heat treatment process of carbon, nitrogen simultaneously to steel piece surface.Based on carburizing, a small amount of nitrogen is penetrated into.Cause
Carbonitriding technology early stage used cyanogen salt or atmosphere containing dicyanogen as penetration enhancer, therefore also known as " cyaniding ".It is divided by permeation medium state
3 class of gas, liquid and solid.Solid and liquid carbonitriding have been rarely employed.Dry cyaniding method does not have to cyanogen salt, holds
Surface quality easy to control is, it can be achieved that mechanization, automation, application are wide.Compared with carburizing, there is faster infiltration speed
The advantages that degree, the harden ability and resistance to tempering of higher infiltration layer, wearability and good anti-fatigue performance, treatment temperature is lower, often
For replacing Carburization Treatment.
But existing carbo-nitriding is undesirable for the processing product of automobile engine pump shaft, processing efficiency is low；Cause
This, is unsatisfactory for existing demand, and to this, we have proposed a kind of carbonitriding technologies of automobile engine pump shaft.
Summary of the invention
The purpose of the present invention is to provide a kind of carbonitriding technologies of automobile engine pump shaft, to solve above-mentioned background skill
The problems such as existing carbo-nitriding proposed in art is undesirable for the processing product of automobile engine pump shaft, and processing efficiency is low.
To achieve the above object, the invention provides the following technical scheme: a kind of carbo-nitriding work of automobile engine pump shaft
Skill includes the following steps:
(A) non-carbo-nitriding part locally applies permeability-reducing admixture, takes the region that length is L1 uniform on the top of automobile engine pump shaft
Natural air drying is carried out after painting water-soluble permeability-reducing admixture, a length of 30-40min when air-drying;
(B) pit gas carburizing furnace is preheated, pit gas carburizing furnace is heated to W1 and keeps 10-20min;
(C) workpiece is heated, after pit gas carburizing furnace preheats, instills kerosene 15-25ml to furnace bottom, after waiting the T1 time,
Automobile engine pump shaft after air-drying is put into pit gas carburizing furnace, closes bell, then heated, duration continues T2;
(D) it is passed through ammonia 1 to pit gas carburizing furnace, is passed through ammonia 1, gas in furnace from air inlet pipe above pit gas carburizing furnace top
Pressure stops ventilation when reaching P1, and continues to keep in-furnace temperature W1, and the time continues T3;
(E) furnace roof is opened in direct quenching, after directly taking out the workpiece of temperature W1, is quenched in 130-210 °C of the hot oil directly quenched
Fiery 3-15min takes out workpiece and is placed in progress cold treatment 5-10min in -75 ° to -65 ° of medium;
(F) tempering furnace is heated to W2 by lonneal stable dimensions, and the automobile engine pump shaft after cold treatment is placed in tempering furnace
In be tempered, the time continues 2-3h.
Preferably, W1:830-870 °C of temperature be related in the technique, the time T1 being related in the technique:
10-50s；T2:1-1.5h；T3:1-2h.
Preferably, the length L1:10-20cm being related in the technique, the air pressure being related in the technique are P1:
0.4-1.3kpa。
Preferably, the ammonia 1 in described (D) step is the mixed gas of nitrogen and ammonia, and the accounting of the ammonia is 75-
90%。
Preferably, the medium in described (E) step is the freezing liquid configured with dry ice.
Preferably, the ammonia is thermally decomposed at a temperature of W1, formula are as follows: NH3 → N+3/2H2.
Preferably, tempering operation is at interval of 15min by 90 ° of angles of automobile engine pump shaft pivoting in described (F) step.
The present invention has the advantages that the carbonitriding technology of this kind of automobile engine pump shaft, for automobile engine pump shaft
Part there is the part of demand to carry out carbo-nitriding, the available more uniform carbonitrided case of workpiece surface, and depth ratio
Carburized layer is deep, and cold treatment work step increases substantially workpiece stability, the effect for reducing quenching stress, improving intensity, and reduces
Surface layer retained austenite improves the hardness on automobile engine pump shaft surface and stabilizes size, improves car engine pump
The quality of axis.
Detailed description of the invention
Fig. 1 is the whole flow diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig. 1, a kind of embodiment provided by the invention: a kind of carbonitriding technology of automobile engine pump shaft, packet
Include following steps:
(A) non-carbo-nitriding part locally applies permeability-reducing admixture, takes the region that length is L1 uniform on the top of automobile engine pump shaft
Natural air drying is carried out after painting water-soluble permeability-reducing admixture, a length of 30-40min when air-drying;
(B) pit gas carburizing furnace is preheated, pit gas carburizing furnace is heated to W1 and keeps 10-20min;
(C) workpiece is heated, after pit gas carburizing furnace preheats, instills kerosene 15-25ml to furnace bottom, after waiting the T1 time,
Automobile engine pump shaft after air-drying is put into pit gas carburizing furnace, closes bell, then heated, duration continues T2;
(D) it is passed through ammonia 1 to pit gas carburizing furnace, is passed through ammonia 1, gas in furnace from air inlet pipe above pit gas carburizing furnace top
Pressure stops ventilation when reaching P1, and continues to keep in-furnace temperature W1, and the time continues T3;
(E) furnace roof is opened in direct quenching, after directly taking out the workpiece of temperature W1, is quenched in 130-210 °C of the hot oil directly quenched
Fiery 3-15min takes out workpiece and is placed in progress cold treatment 5-10min in -75 ° to -65 ° of medium, increases substantially workpiece and stablize
Property, quenching stress is reduced, plays the role of improving intensity;
(F) tempering furnace is heated to W2 by lonneal stable dimensions, and the automobile engine pump shaft after cold treatment is placed in tempering furnace
In be tempered, the time continues 2-3h, reduces surface layer retained austenite, improves hardness, and stable dimensions improve product quality.
Automobile engine pump shaft is taken out from tempering furnace, naturally cools to room temperature in air, completes carbo-nitriding work
Skill makes automobile engine pump shaft obtain stable carbonitrided case.
In this embodiment, W1:830-870 °C of the temperature being related in technique, the time T1:10- being related in technique
50s；T2:1-1.5h；T3:1-2h.
In this embodiment, the length L1:10-20cm being related in technique, the air pressure being related in technique are P1:0.4-
1.3kpa。
In this embodiment, the ammonia 1 in (D) step is the mixed gas of nitrogen and ammonia, and the accounting of ammonia is 75-90%.
In this embodiment, the medium in (E) step is the freezing liquid configured with dry ice, and cold treatment effect is good.
In this embodiment, ammonia is thermally decomposed at a temperature of W1, formula are as follows: NH3 → N+3/2H2.
In this embodiment, in (F) step tempering operation at interval of 15min by 90 ° of angles of automobile engine pump shaft pivoting,
Improve tempering effect.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (7)
1. a kind of carbonitriding technology of automobile engine pump shaft, which comprises the following steps:
(A) non-carbo-nitriding part locally applies permeability-reducing admixture, takes the region that length is L1 uniform on the top of automobile engine pump shaft
Natural air drying is carried out after painting water-soluble permeability-reducing admixture, a length of 30-40min when air-drying;
(B) pit gas carburizing furnace is preheated, pit gas carburizing furnace is heated to W1 and keeps 10-20min;
(C) workpiece is heated, after pit gas carburizing furnace preheats, instills kerosene 15-25ml to furnace bottom, after waiting the T1 time,
Automobile engine pump shaft after air-drying is put into pit gas carburizing furnace, closes bell, then heated, duration continues T2;
(D) it is passed through ammonia 1 to pit gas carburizing furnace, is passed through ammonia 1, gas in furnace from air inlet pipe above pit gas carburizing furnace top
Pressure stops ventilation when reaching P1, and continues to keep in-furnace temperature W1, and the time continues T3;
(E) furnace roof is opened in direct quenching, after directly taking out the workpiece of temperature W1, is quenched in 130-210 °C of the hot oil directly quenched
Fiery 3-15min takes out workpiece and is placed in progress cold treatment 5-10min in -75 ° to -65 ° of medium;
(F) tempering furnace is heated to W2 by lonneal stable dimensions, and the automobile engine pump shaft after cold treatment is placed in tempering furnace
In be tempered, the time continues 2-3h.
2. a kind of carbonitriding technology of automobile engine pump shaft according to claim 1, it is characterised in that: the technique
In be related to W1:830-870 °C of temperature, the time T1:10-50s being related in the technique；T2:1-1.5h；T3:1-2h.
3. a kind of carbonitriding technology of automobile engine pump shaft according to claim 1, it is characterised in that: the technique
In the length L1:10-20cm that is related to, the air pressure being related in the technique is P1:0.4-1.3kpa.
4. a kind of carbonitriding technology of automobile engine pump shaft according to claim 1, it is characterised in that: (D)
Ammonia 1 in step is the mixed gas of nitrogen and ammonia, and the accounting of the ammonia is 75-90%.
5. a kind of carbonitriding technology of automobile engine pump shaft according to claim 1, it is characterised in that: (E)
Medium in step is the freezing liquid configured with dry ice.
6. a kind of carbonitriding technology of automobile engine pump shaft according to claim 4, it is characterised in that: the ammonia
It is thermally decomposed at a temperature of W1, formula are as follows: NH3 → N+3/2H2.
7. a kind of carbonitriding technology of automobile engine pump shaft according to claim 1, it is characterised in that: (F)
Tempering operation is at interval of 15min by 90 ° of angles of automobile engine pump shaft pivoting in step.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443932.6A CN110016637A (en) | 2019-05-27 | 2019-05-27 | A kind of carbonitriding technology of automobile engine pump shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443932.6A CN110016637A (en) | 2019-05-27 | 2019-05-27 | A kind of carbonitriding technology of automobile engine pump shaft |
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| CN110016637A true CN110016637A (en) | 2019-07-16 |
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| CN201910443932.6A Pending CN110016637A (en) | 2019-05-27 | 2019-05-27 | A kind of carbonitriding technology of automobile engine pump shaft |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1209466A (en) * | 1998-06-15 | 1999-03-03 | 张秋英 | Two-stage carbonitriding technology for gear |
| CN103805753A (en) * | 2013-10-15 | 2014-05-21 | 刘强 | Low-carbon alloy steel heat treatment process |
| CN104073814A (en) * | 2014-07-15 | 2014-10-01 | 安庆银泰轴承有限公司 | Heat treatment process of high-carbon chromium bearing steel |
| CN105734593A (en) * | 2014-12-12 | 2016-07-06 | 重庆晨宇机床制造有限公司 | Heat treatment technology for driving shaft |
-
2019
- 2019-05-27 CN CN201910443932.6A patent/CN110016637A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1209466A (en) * | 1998-06-15 | 1999-03-03 | 张秋英 | Two-stage carbonitriding technology for gear |
| CN103805753A (en) * | 2013-10-15 | 2014-05-21 | 刘强 | Low-carbon alloy steel heat treatment process |
| CN104073814A (en) * | 2014-07-15 | 2014-10-01 | 安庆银泰轴承有限公司 | Heat treatment process of high-carbon chromium bearing steel |
| CN105734593A (en) * | 2014-12-12 | 2016-07-06 | 重庆晨宇机床制造有限公司 | Heat treatment technology for driving shaft |
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Application publication date: 20190716 |